add an early form of the CompUnitRepo implementation

This is something to play with, and I expect that about
80% of this will land in nom. JVM backend and windows
support deserves more love than it got.
create libraries.cfg if missing
Merge pull request #249 from hoelzro/nom

Lazily initialize $!WHICH in Set
fix for .combinations timeout
Don't itemize make's ast argument
larry is typically known as TimToady++
Install the debugger on MoarVM.
run new advent tests
run another advent test
need to panic now!

Otherwise it would continue and complain about missing method NQPMu.ast because of lacking $<term_init>.
fix typo in credits
fix file names, FROGGS++
track file rename
Adjusted Grammar.nqp to parse a few more unspace-related tests.
Merge pull request #250 from peschwa/slightly_improved_unspace

Adjusted Grammar.nqp to parse a few more unspace-related tests.
Fix REPL/debugger interaction.

When you wrote one line in the debugger REPL, than a second that used
something in the first, things got messed up. This fixes it.
Promise.keep should not scalarize its result.
confused X::TypeCheck::Bindings got and wanted args
another got/wanted order wrongness
Fix JVM runner install on Win32.